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Attention: RHN Hosted will reach the end of its service life on July 31, 2017.
Customers will be required to migrate existing systems to Red Hat Subscription Management prior to this date.
Learn more here

Details

The Red Hat Security Response Team has rated this update as having moderatesecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

It was found that RESTEasy was vulnerable to XML External Entity (XXE)attacks. If a remote attacker submitted a request containing an externalXML entity to a RESTEasy endpoint, the entity would be resolved, allowingthe attacker to read files accessible to the user running the applicationserver. This flaw affected DOM (Document Object Model) Document and JAXB(Java Architecture for XML Binding) input. (CVE-2012-0818)

Note: The fix for CVE-2012-0818 is not enabled by default. This update addsa new configuration option to disable entity expansion in RESTEasy. Ifapplications on your server expose RESTEasy XML endpoints, aresteasy.document.expand.entity.references configuration snippet must beadded to their web.xml file to disable entity expansion in RESTEasy. Referto Red Hat Bugzilla bug 785631 for details.

Warning: Before applying this update, back up your JBoss EnterpriseApplication Platform's "jboss-as/server/[PROFILE]/deploy/" directory, alongwith all other customized configuration files.

Users of JBoss Enterprise Application Platform 5.1.2 on Red Hat EnterpriseLinux 4, 5, and 6 should upgrade to these updated packages, which correctthis issue. The JBoss server process must be restarted for this update totake effect.

Solution

Before applying this update, make sure all previously-released erratarelevant to your system have been applied.